update table1 set column1 = table2.column1,column2 = table2.column2
from
(
select sum(column1),sum(column2) from table1 where 1 = 1
)as table2
where 2 = 2
update table1 set column1 = table2.column1,column2 = table2.column2
from
(
select sum(column1),sum(column2) from table1 where 1 = 1
)as table2
where 2 = 2